SpringBoot&Elasticsearch
SpringBoot集成es有三种方法：java api、rest client、data-es，
主流的是第三种方法
java api：这种方式，官方已经明确表示在ES 7.0版本中将弃用TransportClient客户端，且在8.0版本中完全移除它。
rest client：官方给出来的REST Client有Java Low Level REST Client和Java Hight Level REST Client两个，前者兼容所有版本的ES，后者是基于前者开发出来的，只暴露了部分API，待完善。
spring-data-es：Spring提供了本身基于SpringData实现的一套方案spring-data-elasticsearch，还有后来衍生的spring-boot-data-elasticsearch，都是一样的，版本之间的搭配建议为：
spring data elasticsearch elasticsearch 3.1.x 6.2.2 3.0.x 5.5.0 2.1.x 2.4.0 2.0.x 2.2.0 1.3.x 1.5.2
注意：
学习方式(官方文档)
查看官方文档地址：https://www.elastic.co/guide/index.html分别可以查询ES集成的三种方式。
1、引入依赖包
创建一个springboot的项目 同时勾选上
springboot-web的包以及Nosql的elasticsearch的包如果没有就手动引入（
注意自己ES的版本）
<!--es客户端--> <dependency> <groupId>org.elasticsearch.client</groupId> <artifactId>elasticsearch-rest-high-level-client</artifactId> <version>7.9.2</version> </dependency> <!--springboot的elasticsearch服务--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-elasticsearch</artifactId> </dependency> <!--json工具--> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.78</version> </dependency>
注意下spring-boot的parent包内的依赖的es的版本是不是你对应的版本
不是的话就在pom文件下写个properties的版本
<!--这边配置下自己对应的版本--> <properties> <java.version>1.8</java.version> <elasticsearch.version>7.9.2</elasticsearch.version> </properties>
2、配置类
注入RestHighLevelClient 客户端
@Configuration public class ElasticSearchClientConfig { @Bean public RestHighLevelClient restHighLevelClient(){ RestHighLevelClient client = new RestHighLevelClient( RestClient.builder(new HttpHost("127.0.0.1",9200,"http")) ); return client; } }
3、索引API测试
@Autowired private RestHighLevelClient restHighLevelClient; //测试索引的创建 @Test void testCreateIndex() throws IOException { //1.创建索引的请求 CreateIndexRequest request = new CreateIndexRequest("mmdz_index"); //2客户端执行请求，请求后获得响应 CreateIndexResponse response = restHighLevelClient.indices().create(request, RequestOptions.DEFAULT); System.out.println(response); } //测试索引是否存在 @Test void testExistIndex() throws IOException { //1.获取索引的请求 GetIndexRequest request = new GetIndexRequest("mmdz_index111"); //2客户端执行请求，请求后获得响应 boolean exist = restHighLevelClient.indices().exists(request, RequestOptions.DEFAULT); System.out.println("测试索引是否存在-----"+exist); } //删除索引 @Test void testDeleteIndex() throws IOException { DeleteIndexRequest request = new DeleteIndexRequest("mmdz_index"); AcknowledgedResponse delete = restHighLevelClient.indices().delete(request,RequestOptions.DEFAULT); System.out.println("删除索引--------"+delete.isAcknowledged()); }
4、文档API操作
//测试添加文档 @Test void testAddDocument() throws IOException { Person person = new Person("mmdz",27); IndexRequest request = new IndexRequest("mmdz_index"); request.id("1"); //设置超时时间 request.timeout("1s"); //将数据放到json字符串 request.source(JSON.toJSONString(person), XContentType.JSON); //发送请求 IndexResponse response = restHighLevelClient.index(request,RequestOptions.DEFAULT); System.out.println("添加文档-------"+response.toString()); System.out.println("添加文档-------"+response.status()); } //测试文档是否存在 @Test void testExistDocument() throws IOException { //测试文档的 没有index GetRequest request= new GetRequest("mmdz_index","1"); //没有indices()了 boolean exist = restHighLevelClient.exists(request, RequestOptions.DEFAULT); System.out.println("测试文档是否存在-----"+exist); } //测试获取文档 @Test void testGetDocument() throws IOException { GetRequest request= new GetRequest("mmdz_index","1"); GetResponse response = restHighLevelClient.get(request, RequestOptions.DEFAULT); System.out.println("测试获取文档-----"+response.getSourceAsString()); System.out.println("测试获取文档-----"+response); } //测试修改文档 @Test void testUpdateDocument() throws IOException { Person person = new Person("李逍遥", 55); //修改是id为1的 UpdateRequest request= new UpdateRequest("mmdz_index","1"); request.timeout("1s"); request.doc(JSON.toJSONString(person),XContentType.JSON); UpdateResponse response = restHighLevelClient.update(request, RequestOptions.DEFAULT); System.out.println("测试修改文档-----"+response); System.out.println("测试修改文档-----"+response.status()); } //测试删除文档 @Test void testDeleteDocument() throws IOException { DeleteRequest request= new DeleteRequest("mmdz_index","1"); request.timeout("1s"); DeleteResponse response = restHighLevelClient.delete(request, RequestOptions.DEFAULT); System.out.println("测试删除文档------"+response.status()); } //测试批量添加文档 @Test void testBulkAddDocument() throws IOException { ArrayList<Person> persons =new ArrayList<Person>(); persons.add(new Person("cyx1",5)); persons.add(new Person("cyx2",6)); persons.add(new Person("cyx3",40)); persons.add(new Person("cyx4",25)); persons.add(new Person("cyx5",15)); persons.add(new Person("cyx6",35)); //批量操作的Request BulkRequest request = new BulkRequest(); request.timeout("1s"); //批量处理请求 for (int i = 0; i < persons.size(); i++) { request.add( new IndexRequest("mmdz_index") .id(""+(i+1)) .source(JSON.toJSONString(persons.get(i)),XContentType.JSON) ); } BulkResponse response = restHighLevelClient.bulk(request, RequestOptions.DEFAULT); //response.hasFailures()是否是失败的 System.out.println("测试批量添加文档-----"+response.hasFailures()); // 结果:false为成功 true为失败 // 测试批量添加文档-----false } //测试查询文档 @Test void testSearchDocument() throws IOException { SearchRequest request = new SearchRequest("mmdz_index"); //构建搜索条件 SearchSourceBuilder sourceBuilder = new SearchSourceBuilder(); //设置了高亮 sourceBuilder.highlighter(); //term name为cyx1的 TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("name", "cyx1"); sourceBuilder.query(termQueryBuilder); sourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS)); request.source(sourceBuilder); SearchResponse response = restHighLevelClient.search(request, RequestOptions.DEFAULT); System.out.println("测试查询文档-----"+JSON.toJSONString(response.getHits())); System.out.println("====================="); for (SearchHit documentFields : response.getHits().getHits()) { System.out.println("测试查询文档--遍历参数--"+documentFields.getSourceAsMap()); } // 测试查询文档-----{"fragment":true,"hits":[{"fields":{},"fragment":false,"highlightFields":{},"id":"1","matchedQueries":[],"primaryTerm":0,"rawSortValues":[],"score":1.8413742,"seqNo":-2,"sortValues":[],"sourceAsMap":{"name":"cyx1","age":5},"sourceAsString":"{\"age\":5,\"name\":\"cyx1\"}","sourceRef":{"fragment":true},"type":"_doc","version":-1}],"maxScore":1.8413742,"totalHits":{"relation":"EQUAL_TO","value":1}} // ===================== // 测试查询文档--遍历参数--{name=cyx1, age=5} }
测试的 elasticsearch 导入包
import org.elasticsearch.action.admin.indices.delete.DeleteIndexRequest; import org.elasticsearch.action.bulk.BulkRequest; import org.elasticsearch.action.bulk.BulkResponse; import org.elasticsearch.action.delete.DeleteRequest; import org.elasticsearch.action.delete.DeleteResponse; import org.elasticsearch.action.get.GetRequest; import org.elasticsearch.action.get.GetResponse; import org.elasticsearch.action.index.IndexRequest; import org.elasticsearch.action.index.IndexResponse; import org.elasticsearch.action.search.SearchRequest; import org.elasticsearch.action.search.SearchResponse; import org.elasticsearch.action.support.master.AcknowledgedResponse; import org.elasticsearch.action.update.UpdateRequest; import org.elasticsearch.action.update.UpdateResponse; import org.elasticsearch.client.RequestOptions; import org.elasticsearch.client.RestHighLevelClient; import org.elasticsearch.client.indices.CreateIndexRequest; import org.elasticsearch.client.indices.CreateIndexResponse; import org.elasticsearch.client.indices.GetIndexRequest; import org.elasticsearch.common.unit.TimeValue; import org.elasticsearch.common.xcontent.XContentType; import org.elasticsearch.index.query.QueryBuilders; import org.elasticsearch.index.query.TermQueryBuilder; import org.elasticsearch.search.SearchHit; import org.elasticsearch.search.builder.SearchSourceBuilder;
